OFDM系统中不同调制方案的选择组合分集接收机性能比较

2010 13th International Conference on Computer and Information Technology (ICCIT) Pub Date : 2010-12-01 DOI:10.1109/ICCITECHN.2010.5723922

Nadia Nowshin, A. Arifuzzman, Md. Anwar Hossain, M. Tarique

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引用次数: 2

摘要

本文研究了在正交频分复用(OFDM)的平坦瑞利通信信道上，利用选择组合(SC)分集技术，利用移相键控(M-PSK)和正交调幅(M-QAM)传输信息的性能分析(即码元错误率)。众所周知，多径衰落现象是无线信道的固有特性。本文介绍了选择组合分集方案如何通过减小信道因衰落引起的波动来提高无线通信的可靠性。仿真结果表明，M-PSK和M-QAM的信噪比(SNR)不同，但随着接收天线数量的增加，信噪比增益有所提高，两根、三根和四根接收天线的分集增益分别约为20-27 dB、22-30 dB和23-31 dB。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Performance comparison of Selection Combining diversity receivers for different modulation schemes in OFDM system

This paper deals with the performance analysis (i.e., Symbol Error Rate) of M-ary Phase-shift-keying (M-PSK) and M-ary Quadrature Amplitude Modulation (M-QAM) to transmit information using Selection Combining (SC) diversity technique over flat Rayleigh communication channel with Orthogonal Frequency Division Multiplexing (OFDM). It is well known that the multipath fading phenomenon is an inherent characteristic of wireless channel. In this paper, it is shown how selection combining diversity scheme enhances reliability in wireless communication by minimizing the channel fluctuations due to fading. The simulation results show that the Signal-to-Noise Ration (SNR) varies between M-PSK and M-QAM but better SNR gain achieved as the number of receiving antenna increases like for two, three and four receiving antennas around 20–27 dB, 22–30 dB, 23–31 dB diversity gains are found respectively.

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2010 13th International Conference on Computer and Information Technology (ICCIT)

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